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Khuếch tán dị hướng Perona-Malik làm mịn các vùng phẳng trong khi vẫn giữ được các cạnh sắc nét. Lý tưởng để khử nhiễu trong khi vẫn giữ cấu trúc quan trọng.
Giảm nhiễu hình ảnh bằng khuếch tán dị hướng Perona-Malik trong khi vẫn giữ được các cạnh và ranh giới cấu trúc quan trọng.
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Anisotropic diffusion is an edge-preserving smoothing technique based on the heat equation. Unlike Gaussian blur which smooths everything uniformly, it adapts the diffusion rate based on local gradients — smoothing flat areas while leaving edges sharp.
Both preserve edges, but anisotropic diffusion is an iterative PDE-based method that naturally evolves over time, while bilateral filtering is a single-pass weighted average. Anisotropic diffusion often produces more natural-looking results for denoising.